Non-equilibrium phase control of molecular conductors by intense terahertz pulse excitation

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We performed terahertz(THz) pump experiments to investigate non-equilibrium carrier dynamics in organic materials. We achieved to generate an intense THz pulse with the peak electric-field of 0. 7 MV/cm, and THz electric-field-induced one-dimensional excitons generation in aligned semiconducting single-walled carbon nanotubes was observed at room temperature. The non-equilibrium dynamics of the charge-ordered phase ofθ-(BEDT-TTF)_2CsZn(SCN)_4 was investigated by the THz-pump and THz-probe experiments, and the transmission change in the THz spectral region was observed by performing the THz pulse excitation. Finally, we proposed and developed a method to quickly and precisely determine the polarization direction of THz pulses for investigating an electron spin dynamics in organic materials for future studies.